Well, it took a little longer than expected, but we are pleased to announce that TurnKey Core - the common base for all appliances, has been released based on Ubuntu 10.04 LTS (Lucid Lynx).
Ubuntu 10.04 LTS will be supported for five years.
This is a beta release, so take it for a spin, let us know what you think. If you come across any issues, please report them. If you have ideas on how to make it better, let us know.